The invention discloses dandelion health tea and a preparation method thereof. The dandelion health tea comprises the following raw materials in parts by weight: 55-60 parts of mother chrysanthemum flowers, 20-25 parts of dandelion, 4-5 parts of cortex dictamni, 6-8 parts of momordica grosvenori, 1-3 parts of crab shell powder, 2-4 parts of bee pollen, 5-6 parts of bamboo vinegar, 7-8 parts of lactuca sativa, 4-6 parts of rose petals, 2-4 parts of mashed seaweeds, 5-10 parts of tricholoma, 6-10 parts of white gourd slices, 2-4 parts of seaweeds, 5-6 parts of bitter gourds, 8-10 parts of tulip petals, 3-4 parts of water chestnut powder, 2-4 parts of wolfberry leaves, 5-6 parts of radix rehmanniae recen ad a proper amount of water. The health tea disclosed by the invention belongs to a low-sugar drink and does not contain any synthetic food additive; the prepared health tea is aromatic in flavor; and moreover, due to the addition of the dandelion and other multiple health components, the health tea disclosed by the invention has multiple health effects of promoting the secretion of saliva or body fluid, bringing down a fever, tonifying kidney, quenching thirst, relaxing bowels, dispelling the effects of alcohol, quenching the thirst, moistening lung, relaxing bowels, and the like.